For more than thirty years, the Aprovecho Research Center has been designing cleaner, low-cost cooking stoves for the developing world.

VOA: special.2010.02.01

On the Big Island, red-hot lava has been flowing from the Kilauea volcano since the early nineteen eighties.

VOA: special.2009.03.02

The book is kept by the Library of Congress and has never been used at another swearing-in.

VOA: special.2009.01.19

A government-owned group of companies,Dubai World, has been seeking to restructure twenty-six billion dollars of debt.

VOA: special.2009.12.11

Experts say Aquarius will gather as much information about sea surface salinity as has been collected by ships over the past one hundred twenty-five years.

VOA: special.2011.06.22

The number of man-made objects in Earth orbit has been growing each year.

VOA: special.2009.04.01

(RICHIE HAVENS - "FREEDOM") Much has been said about Woodstock, real or imagined.

VOA: special.2009.08.10

He said: "A man who has once been the candidate of his party -- and defeated -- owes it to his party not to be a candidate again."

VOA: special.2010.05.27

Jozy Altidore has been called the United States' biggest goal-scoring threat.

VOA: special.2010.06.09

The White House has been home to forty-three presidents.

VOA: special.2009.05.08

Bob Steinrauf has been married for almost twenty-eight years.

VOA: special.2010.02.08

Mr.Furman has been setting records since nineteen seventy-nine.

VOA: special.2011.05.16

"I think most of the violence that we have seen from extreme right-wing groups has been of a more, if you will,casual,street variety targeted against demonstrations by immigrant groups or simple attacks on immigrants."

VOA: special.2011.07.30

It has been translated into thirty-nine languages.

VOA: special.2009.03.15